CN201916292U - A shaft locking device - Google Patents

Abstract

The utility model discloses a rotating shaft locking device, which comprises a rotating shaft (10) penetrating through a locking cover (3) and a locking seat (14), wherein a gear wheel (9) is fixed on the rotating shaft; internal teeth meshed with the teeth of the gear wheel (9) are arranged on a locking jaw (13) with a handle; and the locking jaw (13) can rotate around a cylindrical pin (12) fixed on the locking cover (3) and/or the locking seat (14) so as to enable the inner teeth to be contacted with or separated from the gear wheel (9). The rotating shaft locking device adopts the internal teeth to lock the gear wheel, utilizes bolt-spacing and spring-resetting mechanisms, and is reasonably integrated. The device requires no alignment, thereby reducing operating steps and improving the productive maintenance efficiency. The device utilizes the lever principle to greatly improve the locking force, requires no disassembly of all parts from the machine body during the operating process, and has excellent production manufacturability.

Description

A shaft locking device

technical field

The utility model belongs to the field of metallurgical machinery and relates to a locking mechanism.

Background technique

In metallurgical machinery, such a situation is often encountered: a rotating shaft needs to be reversed at a certain moment, and needs to be fixed at another moment (such as adjusting and locking the rolling mill roll gap, etc.), which involves the rotating shaft locking device . At present, bolt locking is more commonly used. As shown in Figure 1, the tooth shape is processed on the shaft a, and then a flat head bolt d is designed, and the end cover c and bolt e are added for compression. When the rotating shaft needs to be rotated, it is necessary to loosen the bolt e first, then remove the end cover c, and then take out the latch d. When the rotation is completed and the shaft needs to be locked, perform the reverse operation in the above sequence.

There are following deficiencies in this kind of locking method: the one, there are many steps when adjusting the rotating shaft, and the operation is cumbersome. The second is that there is an alignment requirement during the assembly of the bolt d, that is, the middle part of the bolt is a cylinder, and the top is made into a flat head to match the teeth. In this way, special alignment must be made every time the assembly is made, otherwise it will not fit in. The 3rd, end cover c, bolt e and latch d are all small-sized dismantling parts, if use environment is bad or when confusion, dismounting parts may be dirty or lost.

Utility model content

The purpose of the utility model is to provide a rotating shaft locking device with reasonable structure and easy operation.

In order to achieve the above object, the following technical solution is adopted: a rotating shaft locking device, which is characterized in that: the locking device includes a rotating shaft that passes through the locking cover and the locking seat, a gear is fixed on the rotating shaft, and a handle is provided. The locking pawl is provided with internal teeth that mesh with the teeth on the gear, and the locking pawl can rotate around a cylindrical pin fixed on the locking cover and/or the locking seat so that the internal teeth contact or leave the gear.

As a further optimization, in order to limit the locking claw and prevent the loosening of the engagement at the same time, a limit pin is arranged on the locking cover or the locking seat, and the limit pin fixes the locking claw so that the locking claw The inner teeth on the upper mesh with the gear completely.

As a further optimization, in order to reset the limit pin, the limit pin is covered with a helical compression spring, and the knurled nut is connected with the limit pin passing through the locking cover or the locking seat.

As a further optimization, in order to facilitate the reset of the locking claw, a helical tension spring is arranged between the locking claw and the locking seat.

As a further optimization, in order to facilitate the adjustment of the rotating shaft, the input end of the rotating shaft is square.

As a further optimization, in order to facilitate fixing, the gear is fixed by a key arranged in a key groove inside the rotating shaft and the gear.

As a further optimization, in order to axially position the gear, a shaft sleeve is provided on the outer side of the gear.

As a further optimization, in order to make the rotating shaft rotate smoothly, a bearing is also arranged on the rotating shaft.

As a further optimization, in order to utilize the leverage principle of the locking pawl to provide a very large locking force, the inner teeth of the locking pawl are located near the head where the locking pawl can rotate.

The beneficial effects of the utility model are:

The utility model adopts the design of the locking gear with internal teeth, and uses the latch limit and spring return mechanism at the same time, and is reasonably integrated together. The device does not need to be aligned during operation, which reduces operating steps and improves production and maintenance efficiency. Utilizing the principle of leverage, the locking force can be greatly improved. At the same time, all parts do not need to be disassembled from the body during operation, and the production process is good.

Description of drawings

Fig. 1 is existing common latch locking structure;

Fig. 2 is the three-dimensional exploded view of the utility model embodiment;

Fig. 3 is a locking state diagram of the utility model embodiment;

Fig. 4 is the open state figure of the utility model embodiment;

Fig. 5 is a sectional view of the utility model embodiment.

In the figure: piece a is the shaft, piece b is the shell, piece c is the end cover, piece d is the latch, piece e is the bolt, piece 1 is the screw, piece 2 is the knurled nut, piece 3 is the locking cover, piece 4 is a spiral compression spring, piece 5 is a limit pin, piece 6 is a bearing, piece 7 is a shaft sleeve, piece 8 is a key, piece 9 is a gear, piece 10 is a rotating shaft, piece 11 is a helical extension spring, and piece 12 is a cylinder Pin, part 13 is a locking claw, and part 14 is a locking seat.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.

As shown in FIGS. 2 to 5 , firstly, there is a rotating shaft 10 . In order to adjust the rotating shaft 10, the input end of the rotating shaft is designed as a square shape, and the output end is designed with a keyway. In order to lock the shaft, a gear 9 is designed, and the gear and the shaft transmit torque through the key 8. For making rotating shaft 10 rotate smoothly, bearing 6 is installed on the axle. In order to lock the gear 9, a locking pawl 13 is designed. The locking pawl is designed with a plurality of internal teeth matched with the gear 9, and utilizes the lever principle of the locking pawl to provide a very large locking force by itself. The locking claw rotates around the cylindrical pin 12 to realize disengagement and engagement with the gear 9 . Simultaneously, a helical extension spring 11 is designed on the locking claw 13 to realize the self-resetting of the locking claw. Since the locking pawl is swinging, in order to limit it and prevent the engagement from loosening, a limit pin 5 is designed. Simultaneously in order to reset the limit pin, a helical compression spring 4 is provided. For the convenience of twitching the stop pin 5, one end of the pin is designed with a thread, and a knurled nut 2 is connected with it. For the axial positioning of the gear 9, a shaft sleeve 7 is designed. Finally, a series of components on the rotating shaft 10 are installed in a locking housing composed of a locking cover 3 and a locking seat 14 , and the locking cover and the locking seat are fastened by bolts 1 . The assembly relationship is as follows: the locking seat 14 is fixed, and the bearing 6 is packed into the counterbore of the locking seat 14 . Install rotating shaft 10, key 8, gear 9, axle sleeve 7 and bearing 6 in sequence to form a whole series of shafting. Then insert the cylindrical pin 12 into the pin hole of the locking seat 14 , and then put the locking claw 13 on the cylindrical pin 12 . Then put the helical compression spring 4 on the limit pin 5, insert the two together into the round hole of the locking cover 3, expose the threaded end of the limit pin to the locking cover 3 and tighten it with the knurled nut 5 at the same time. Finally, the locking cover 3 and the locking seat 14 are put together and tightened with the bolt 1.

Specific operation: in the locked state: the locking claw 13 meshes with the gear 9 through the internal teeth on the claw, and at the same time its swing around the cylindrical pin 12 is limited by the limit pin 5. At this time, the locking claw is in a stable state, and the gear 9 Also can't rotate, reach the purpose of locking rotating shaft 10. If the rotating shaft 10 needs to be rotated, the limit pin 5 is pulled out for a certain displacement through the knurled nut 2, the locking claw 13 is pulled to the open state from the gear meshing state, the knurled nut 2 is released, and the limit pin 5 is placed on the helical compression spring. 4 automatically resets under the effect, and its head is inserted in the hole of locking seat 14. At this time, the locking pawl 13 is kept disengaged from the gear 9 due to the spacing of the limiting pin 5, and the rotating shaft 10 can rotate freely. Due to the existence of the helical extension spring 11 and the upper limit pin 5, the locking pawl 13 will not swing in the open state. And once the rotating shaft 10 is not needed to rotate, the stopper pin 5 is pulled out again, and the locking pawl 13 automatically resets under the effect of the helical extension spring 11, tightly meshes with the gear 9, and the rotating shaft 10 is locked.

Finally, it should be noted that the above embodiments are only used to illustrate the utility model rather than limit the technical solution described in the utility model; therefore, although the specification has described the utility model in detail with reference to the above-mentioned various embodiments, Those of ordinary skill in the art should understand that the utility model can still be modified or equivalently replaced; and all technical solutions and improvements that do not depart from the spirit and scope of the utility model should be covered by the scope of claims of the utility model among.

Claims (9)

1. rotating shaft locking device, it is characterized in that: described locking device comprises and is arranged at the rotating shaft (10) of passing tightening cover (3) and locking bed (14), be fixed with gear (9) in the rotating shaft, locking jaw (13) with handle is provided with the internal tooth that is meshed with tooth on the gear (9), and described locking jaw (13) can rotate and make the internal tooth contact or leave gear (9) around being fixed on straight pin (12) on tightening cover (3) and/or the locking bed (14).

2. rotating shaft locking device as claimed in claim 1, it is characterized in that: described tightening cover (3) or locking bed (14) are provided with a position limit pin (5), position limit pin (5) is fixing with locking jaw (13), makes that internal tooth and the gear on the locking jaw (13) meshes fully.

3. rotating shaft locking device as claimed in claim 2 is characterized in that: be with helical compression spring (4) on the described position limit pin (5), knurled nut (2) is connected with the position limit pin (5) that passes described tightening cover (3) or locking bed (14).

4. rotating shaft locking device as claimed in claim 3 is characterized in that: be provided with spiral tension spring (11) between described locking jaw (13) and the locking bed (14).

5. rotating shaft locking device as claimed in claim 4 is characterized in that: the input end of described rotating shaft (10) is square.

6. rotating shaft locking device as claimed in claim 5 is characterized in that: described gear (9) is fixing by the key (8) in the keyway that is arranged at rotating shaft (10) and gear inboard.

7. rotating shaft locking device as claimed in claim 6 is characterized in that: the outside of described gear (9) also is provided with axle sleeve (7).

8. rotating shaft locking device as claimed in claim 7 is characterized in that: also be provided with bearing (6) in the described rotating shaft (10).

9. as the arbitrary described rotating shaft locking device of claim 1 to 8, it is characterized in that: the internal tooth of described locking jaw (13) is positioned near the rotatable head position of locking jaw (13).

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